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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa05b95f89a2492277ea10864d70f0a3b98a9c34790f3fdcfa7486071c90fa85' 
  AND token = 'qV3ZP3RVG+1ultOX6QShn8sIX/phAYDxkE1IfWj7fmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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