Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27ec9b0ba4095c371be49a77520314a956edfa54a577a096e895ca15b865a5f3' 
  AND token = 'cKkV9uhcFZUzKl9Wq5BEChvExzTFaEB5nJzoObPAFTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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