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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '124f44069bc35a0c93261a47da3733aa68ac8240e82d39c25494bf15cc9ef4af' 
  AND token = 'maU9JZqAxanyv3IO88E0aYIOURuMEcS03J4VBx3A6sU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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