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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '980c0e0e89e180f64a0242929684742a6fd1840c17db7e6b3d9e6006653dc785' 
  AND token = 'klbmJcmjY4T2vWxU8ZYEoofx1c36wmG5ZcbE3imMYZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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