Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e70ad1c1c4f7f14060117234f25a7552a15f7a2df15df10554696f29a1c81a9c' 
  AND token = 'R7Z4W/otU2AAQ/p7DhzBeGpc0fKrrcaybP8VAeiZxFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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