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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'aebf443acba7dbf3511998f8cbf1803a898b931a9585afbae47c7145cbc9a8b1' 
  AND token = 'yfS2wtkC+uyHQgW6IOhwwhm0lgL/iB8kaolvV4aNphs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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