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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '117ffd66d57a150278899fe1d0de838d6a87d80ffefed235ab281a05e8ea8549' 
  AND token = '15A3jHlyxbrwMEUp0Bxljv7epk8mGEV/KDbjmBYDGXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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