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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '26757268dd53785c09a1ca333bf37f24273991d7bd876107e710c3150a628bcd' 
  AND token = 'KhtpDVbrhwyb822SnWcDMAXVE/5rn1Pxbxefqj2zjU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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