Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37b299003f0e14d888d34b4a02fa44ecc8c8829372ae5fee71833555baa07e50' 
  AND token = 'Abr/jYCidGkNMx/Jj2Ul+1+nKqx14LWs5w9qCRvmVs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}