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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45cbd3c0eea9e38c572f3ad8e2f7c8312ba5f0ad459e32643da8448dcd78cb8d' 
  AND token = 'w3NIQ7GZZjO638Mo8wZd017IhZxr8s2tT+OCvN8LMLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}