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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1164c647d59d7569fc032eb7ba7234b0a06242f8a2b4dafbeb5428e9c33b97ab' 
  AND token = 'FNZayRHaMpc6HsM0T6V3L52MQ/iz2/6PS85Ikf/3atM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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