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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ece6a5fbed2d4f2d54f831eff8e6ef7cdee1a347f1877c3b4048bd9d1c70aacf' 
  AND token = 'dHDRSGN67J18SgwHAYT/2Xcp8huDF5Juw9CGW04pSGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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