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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'fe7fa8c59f33604f6c55468835b2f5dec544c4b9fab59dc1d91cfbc3dbfc4bf0' 
  AND token = 'ryXy10dEXc5lSChmcfAoYfYuz5f1HE3/W6RSa0AO5+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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