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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d36512d5c9f72ff33e4baf8fb886e9da84c1c0c2c9e7cb1ec9cfa5658617749' 
  AND token = 'oCCSwqqBETTsB7upHw7n4WQoHuwLpqMgQ8Tv4FQfi5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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