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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e7a1db9d1601240c07ae8dda92ecb592dbdb3b75185a5bbcec9f15fc894b67e' 
  AND token = 'sv9A9BOPeywwYf9syyVzr5m3fMR+vYFmbrZNOCF6hIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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