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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0e3dd2d8d7ec05d8f80d7262f32ad397cb862e1112f40930578a727af65a7da' 
  AND token = 'iDtDcS4OtF4JUKfJkteC1rTBTamXNUOmGJL7aDZMOn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}