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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3025abc7af6a02b3a4aee3e5ea68d0436405ab8fd42f992bf93f3cf17b30016a' 
  AND token = 'YuaHqDrEIrj5Wpzv4n+oFX3Io0hxEKvbZgHzcpd59vQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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