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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06632dee145f3208f0f9351e6280f9d135d1a5b97a90b41780c0950909e31853' 
  AND token = 'DdTYqq9+GTOYG91AMUydLEq2nVvKG78y9Se0ICXirYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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