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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'b3dc6a7db31e6c58809ccbac9ccfcb06ab22e486c70c531ef554dcfe94af24c3' 
  AND token = 'nC1HW6a296avpMNHM2XMMdZO6fX0eI1v1UPcpEkvmJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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