Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44a9c172932db0d2714335ddba47f778336f4383418721b29f35ce584a574d01' 
  AND token = 'kcPTNeDJ2TjoIlzUphMDPCipNroyvgXMnnAhsnq4W7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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