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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0580b6f17b0d3ad3e1f9f1ae99e104881cbc0b318aefa08278fd3c6dc28a9669' 
  AND token = 'zi5M7h7m97JB7dzO4d7UoAqe8i4VdTG7I3wOzp3HofU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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