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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79e5845581a0046834ff24d8d53fef620baa3e189e5af3c97e39a521215b7583' 
  AND token = '9dJYCj3ambA/SeWqQH0MPw8tHNVu8eKvOZcluwq6oNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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