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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '899b94bb1f111af0216ccbaf47d69d358034844ec1622188e0776aaa0a09b080' 
  AND token = 'ZTw0jXDqdtWR6op7+F8ELG6kHu6OICx8uR7omuKotSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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