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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '237bd33a31160047d0c51a11c677ca416a9bfeb90156dc4deca5bdb377089c28' 
  AND token = '7EJHcIhx3Yx6JKzn9sPZxnd6h3PKv5RPb+9gu/MI1Xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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