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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b7ee31a898e86a4995afa3963059905bc068c6ac358353e901249d8c8744381' 
  AND token = 'Lo8TB5Pbc++uhgiVdE/mlQ+QlIyH1/onaytCfPKBvhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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