Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08ac2552ec7fb22b85dfc9cd5d628ead570ab47a4a2e172c428ff88f0baf87f9' 
  AND token = '+iH4mXEI0TGj/OIuuMBBtB2bVOD+bfyIe6hsZwkVLA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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