Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf3b6b3f5ba8bebda8cb44712e8f31ccad5c46ac27b366cc8a1a0b785da56590' 
  AND token = 'AgQj417gAFKQJJBdBRMkig7KS/Af8MjUnlhZzjUepuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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