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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cba217e53d323cb016cad8ea3c26ff0c44ed3a968b6904992d704c534c57d940' 
  AND token = 'geu4Wt/F50kT6WGLkZDG7g80O5X44S3MtWZY94I8WYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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