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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bee430b4cc6da661a0f81cbfab26182d300727adf9d658232b6f5d78395f8f2d' 
  AND token = 'wYZarV5/5FJww7+hbxWrfnZeJN5LrastNpwa+RiCTcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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