Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c2a3ce4cf97cc99cdc6f38c9f8985656f681f5d7919cb9f51c8c70e8dc640bd' 
  AND token = 'tdS/Lmxo1BK8VzLpZ7r3Ax+xi3KFrqd7+BvrYNaC3+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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