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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '633fb04e7ce9bf6ed34ff35279fc9ab5de93a48e4361c656e265ccd87a2f2907' 
  AND token = 'RNXVd1thCC8haVQRE+8/XqWvaTK5pnLTXsr4XuK67m0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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