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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'f622b7b7e65eca09bf395192bc59e5a8d7593a734cea4a0ca2d7b2ce63345fe1' 
  AND token = 'NFOyKkNbMHTb9WCGl40pOtssEwv38TSej00nawV83kc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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