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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd922431d9949ab059e2498cdc121853df385fae8c33d4dbcfe5d67c8758d24cb' 
  AND token = 'DUpcr7WYUn5ED43pN788mEIazJtfG5tPOiLIyQ9mCzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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