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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'df8e618b2b71597918b46353952c5ba633172f8478dde2fc48e1b0e5f2e17caa' 
  AND token = 'HnYtvxLhfkh+2Sg3PNeFmChM0tV7cMS21lT2uBkDWpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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