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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9dfa23ebd63edc55a7c53f02550041a83fb70830c6063e56698cb5277291cb24' 
  AND token = 'h9oXlbufKaRQ5+No5mKgg7jm6vjWdtXVRQu6C2E4Cho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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