Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd2e02ac93e552fd8f8ca42bbc4f3f22096566ae3e89b2c2566d9d65489d5e31' 
  AND token = 'sgSmJo/dB2Wz8lCF4BHQgHnIARZ0MDPBMbpN7UGseqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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