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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e63e0160ee5c9b8e2538360a6783395272a7d65094f42c23704632efc64d7601' 
  AND token = 'ZiRLXFH+YE/lq/oZTXW7wuodvoYtV7FtA4iwTsI1pbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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