SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60103b5391e522a743fcdd25ad657374883efb38a26153386c89d64dd703fb37' 
  AND token = 'MX6/tmxB94auZyYwv4UYVFBD2wYQ2RlnndiGpHMWDY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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