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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1172327882b7317005c5d382c9ad16ed32125a8100f0196e355beb193f22c9cf' 
  AND token = 'bVfNY1ey3RX0IHEfPlzeCFKQ/bFL7jVyd7RaOfvNRT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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