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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80f2c106a7230b4860f72735c7651b028d5cef7fabf93ed48269517aa5927c66' 
  AND token = 'HtDLSja8cp2PjIqEiw17XzdFcDsYNiWB2xo2cDrNyR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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