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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e95c75d867fa7c1c8dd39604c204ad674bbc9b1d29b6983d153facace91945f8' 
  AND token = 'BLUJ5Dc6lBZJl4U8vO3bmdeVsNsDAWNxwXBeoGxbfPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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