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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7ee73d0d878b1d61df7326a50edd89a52fc797cfd5b7cf52d5d3a7daf45d393c' 
  AND token = 'h2xMbT9c5/HsbSDzeJ3hImB4cZ6ny5Z38kYapPqOju4=' 
  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"
    }
  }
}