Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f278614b6c0dde9ede1aa14bba09a2ba6829814218d5aba11f7b47cebc73bac' 
  AND token = 'cDVQ/sqgo5btd1kAF8MVD3+EhtQfjYPjX+CfCwoRBD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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