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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6165adc421bc66b4ee202c7af51aa3298417b51bd3786f6e66051caeaf285628' 
  AND token = 'dzN07rCau+aVmk4FBNYR86ERYtd4U3OsF5P3pP5/2Ws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}