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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '36ddad57b8ace76fa66a539dbb6a77d21103ed4d3fd994be2a9210edeabf198b' 
  AND token = '1VqpsPLxK1LGqgoCbgs4gyfS62Ivbi8KhU0pLH8aXbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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