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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d30b2b5b88dd33584f38857f2cefc2073ff82cb8bce34eff79feee9da1e92f8' 
  AND token = 'GXDf7J+57qDEqvQjZ3fo+5li/QdbsebPPGNNosX3pxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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