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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24158bd51fe6e0c03dd36130b1f56bb312a1753302662c5024f636528e11154b' 
  AND token = 'vcM8eW/wkp7liSDYIwbGyjDTg4YBkTGNOEeTvQD24YM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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