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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '113b18ee97f4e0f8469ff0f034b6e172623c86d00472399f4e8af73ffc49fea9' 
  AND token = 'NB9XD0Qp/S6jlI0GTJerSffiVCRLn7idalVqrKO5I5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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