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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f80586329b0419a10e799be91cabbec5c64a3204f55cb72bd34ab6fc70404830' 
  AND token = 'VRY0/h7DUaYIFQ0YCQfn4T1aPxGkiy01xD5X1BsR5OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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