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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f4041da430321adca6f4b5ed8c8e6f65ded87c0d28c87a5eb9c4ea27d8c1efd9' 
  AND token = '55jhy3CUxlk/Q4ynKdha8+hnWabOAwBRRgzUC5uUwmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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